Half-Life of a Reaction

JEE Main Chemistry · Chemical Kinetics · 12 questions, latest first

• Sucrose hydrolyses in acidic medium into glucose and fructose by first order rate law with t_1 / 2=3 hour. The percentage of…20266 April, Shift 1 · Q74
• For a reaction A → P at T K, the half life (t_1 / 2) is plotted as a function of initial concentration [A]_0 of A as given below.…20265 April, Shift 2 · Q75
• t_100 % is the time required for the 100 % completion of the reaction while t_1 / 2 is the time required for 50 % of the reaction…20262 April, Shift 1 · Q58
• For the thermal decomposition of reactant AB(g), the following plot is constructed. The half life of the reaction is ' x^′ min.…202623 January, Shift 1 · Q73
• In a reaction A+B → C, initial concentrations of A and B are related as [A]_0=8[B]_0. The half lives of A and B are 10 min and 40…20253 April, Shift 1 · Q58
• Drug X becomes ineffective after 50 % decomposition. The original concentration of drug in a bottle was 16 mg/mL which becomes 4…202529 January, Shift 2 · Q59
• The ratio of (^14 C)/(^12 C) in a piece of wood is 1/8 part that of atmosphere. If half life of ^14 C is 5730 years, the age of…20241 February, Shift 1 · Q86
• The half-life of radioisotope bromine - 82 is 36 hours. The fraction which remains after one day is ____ × 10^-2. (Given antilog…202429 January, Shift 2 · Q89
• Time required for completion of 99.9\% of a First order reaction is ____ times of half life (t_1 / 2) of the reaction.202427 January, Shift 2 · Q85
• t_87.5 is the time required for the reaction to undergo 87.5 % completion and t_50 is the time required for the reaction to…202313 April, Shift 1 · Q87
• A and B are two substances undergoing radioactive decay in a container. The half life of A is 15 min and that of B is 5 min. If…20231 February, Shift 1 · Q57
• For the first order reaction A → B, the half life is 30 min. The time taken for 75 % completion of the reaction is ____ min.…202325 January, Shift 1 · Q57